A method and apparatus for producing power comprising a grate cooler for cooling clinker supplied from cement production apparatus, an electrostatic precipitator that extracts particulate matter from hot air supplied from said grate cooler, the grate cooler and electrostatic precipitator working in combination with an air-heat transfer heat-exchanger, a pre-heater, a vaporizer, a turbine, and a working fluid condenser, to produce power.